Quick definitions from WordNet (superannuate)
▸ verb: retire and pension (someone) because of age or physical inability
▸ verb: retire or become ineligible because of old age or infirmity
▸ verb: become obsolete
▸ verb: declare to be obsolete
▸ Also see superannuate
▸ verb: retire and pension (someone) because of age or physical inability
▸ verb: retire or become ineligible because of old age or infirmity
▸ verb: become obsolete
▸ verb: declare to be obsolete
▸ Also see superannuate